Artificial Altar is a crafting station added by AlchemistNPC mod.

It acts just as a normal Altar would do, except it's craftable, don't spawn Hardmode ores when destroyed and lets you move it around freely.

Ebonstone Block Ebonstone Block x50
Rotten Chunk Rotten Chunk x15
Battle Potion Battle Potion x5
Thorns Potion Thorns Potion x5
Deathweed Deathweed x10

Ebonstone Block and Rotten Chunk can be replaced wiht their respective substitute if there is Crimson in your world.